This is how you would say it. What do you do on week ends?
Yes, the possessive form of the noun week is the correct form for 'the end of the week' (the week's end).
le week-end - la fin de semaine
Ayez un week-end agréable or Bon week-end
I would say the peak traffic times would be in the evening and on weekends.
avoir un grand week-end à tous
Public Sessions? Depends. If it's a holiday usually around 10-20, but just during the week I'd say around 10.
over the weekend.
bon week-end
fin de semana
"That was the world this week, see you again next week!"
Yes, it is correct to say "I will be present during the meeting next week." This conveys your intention to attend the meeting and be physically there.
le week-end dernier